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Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 1923
Experience:  16 years experience with Mercury
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It will crank and briefly start, then stalls. no check

Customer Question

It will crank and briefly start, then stalls. no check engine light, car is almost full of gas. 90,000 miles, well maintained, ran like a top until I tried starting it this morning. Car has been running on E-85 most all the time.
JA: Does the light stay on, or does it blink?
Customer: the check engine light? it goes off as soon as the car starts.
JA: What is the model of your '90 Mercury?
Customer: it's a 2008 Grand Marquis GS 4.6
JA: Are you fixing your Grand Marquis yourself? What have you tried so far?
Customer: probably not. I haven't tried much of anything but the fuel pump switch in the trunk. was going to go back out and turn the key on for a few seconds a few times before i tried actually starting it.
JA: Anything else you want the mechanic to know before I connect you?
Customer: who are you connecting me to?
JA: I am Pearl, the Mercury Mechanic's Assistant.
Customer: yes, I see that. I thought you were "connecting" me to someone.
Submitted: 5 months ago.
Category: Mercury
Expert:  david craig replied 5 months ago.

Hi Im David, thanks for visiting the site. when the car starts does the security light go out?

Customer: replied 5 months ago.
What is the security light? The check engine light?
Expert:  david craig replied 5 months ago.

its a red light or indicator that might say security or a symbol of a key or a flashing red light on top of the dash

Customer: replied 5 months ago.
it goes out.
Expert:  david craig replied 5 months ago.

how long does it run before stalling

Customer: replied 5 months ago.
About 2 seconds
Expert:  david craig replied 5 months ago.

can you hear the fuel pump run for a few seconds when you turn the key to run

Customer: replied 5 months ago.
I don't hear a hum, no, but I hear the pump switch on and off
Expert:  david craig replied 5 months ago.

are you hearing the pump or the relay?

Expert:  david craig replied 5 months ago.

and reset the inertia switch while your at it.

Customer: replied 5 months ago.
I had previously hit the reset switch, but it did not feel as though it was in need of a reset. Just pushed it again. I can hear a click in the trunk area when turn the key on, so I presume that's the pump relay
Expert:  david craig replied 5 months ago.

let me find out where that relay is...

Expert:  david craig replied 5 months ago.

check in the trunk for that relay or under the rear seat. its not telling me where its at

Customer: replied 5 months ago.
If its a black box with a white cap on one side, its in the trunk. Also the shutoff switch harness goes to it.
Expert:  david craig replied 5 months ago.

ok, so the fule pump as far as we know is not running.

Customer: replied 5 months ago.
Correct, except the car continues to start. How could that happen if the fuel pump isn't working?
Expert:  david craig replied 5 months ago.

do you have someone there with you?

Customer: replied 5 months ago.
No. My neighbor can help but he won't be home for a few hours.
Expert:  david craig replied 5 months ago.

ok. i just want to make darn sure that the fule pump isnt running....do you have a meter?

Customer: replied 5 months ago.
A volt/ohm meter? Yes.
Expert:  david craig replied 5 months ago.

ok. turn the key on and pull the full pump relay. check for 12vdc on any of the contacts on ther base

Customer: replied 5 months ago.
If you think that will help, but as I said, I am hearing the relay when I turn the key on.
Expert:  david craig replied 5 months ago.

i understand that but i want you to jump across the relay base to turn the pump on

Customer: replied 5 months ago.
Okay. Any idea this relay will come out. It's not very accessible and I don't see any mounting bolts.
Expert:  david craig replied 5 months ago.

take pic and send it to me on here

Customer: replied 5 months ago.
Here it is
Expert:  david craig replied 5 months ago.

isnt the the inertia?

Expert:  david craig replied 5 months ago.

thats either the inertia or the test connector

Expert:  david craig replied 5 months ago.

is there a fuse panel back there?

Customer: replied 5 months ago.
No. No fuse panel, and its forward from the inertia switch. I found a pic online
Customer: replied 5 months ago.
Looks like it in there with a plastic push-on trim clip
Expert:  david craig replied 5 months ago.

well the best way to do this if you cant get it out is to wait until someone can listen for the pump

Customer: replied 5 months ago.
Yup. That's what I'm going to do. Thanks
Expert:  david craig replied 5 months ago.

any progress?

Expert:  david craig replied 5 months ago.

do you still need assistance?